package com.day5.t1;

import java.math.BigDecimal;

public class Main {
    public static void main(String[] args) {
        Integer a = null;
        BigDecimal b = a == null ? BigDecimal.ZERO : new BigDecimal(a);
        System.out.println(b);
        BigDecimal c = new BigDecimal("1.0");
        System.out.println(b.multiply(null));
    }
}
